天津压力变送器如何安装,涡街流量计信号输出不准确或不稳定解决办法?-西安华恒变送器厂家
天津压力变送器如何安装,涡街流量计信号输出不准确或不稳定解决办法?
信息来源: 华恒 | [ 2019-05-17 ] 点击量: 241

   涡街流量计管道中没有介质流动而有信号输出或瞬时流量有显示,西安华恒仪表介绍:

 
  There is no medium flow in the pipeline of vortex flowmeter,but there is signal output or instantaneous flow which is obvious.Introduction of Xi'an Huaheng Instrument:
 
  1.首先确认涡街流量计的测量管道内确实没有介质流动或扰动,检查管道振动强度是否过大,若震动大请按照如下方法进行减震:在流量计下游2D处加装管道支撑点;在满足直管要求的前提下,加装软管过度;
 
  1.Firstly,it is confirmed that there is no medium flow or disturbance in the measurement pipeline of the vortex flowmeter.Check whether the vibration intensity of the pipeline is too large.If the vibration is too strong,please reduce the vibration by following methods:installing pipeline support points at the 2D downstream of the flowmeter;installing excessive hoses on the premise of meeting the requirements of the straight pipe;
 
  2.将灵敏度电位器逆时针调整直到没有信号输出或瞬时流量回零为止。在调整电位器时,应尽量缓慢一些,每调整5度角时,要停顿10秒钟以上,以便观察输出是否回零。
 
  2.Adjust the sensitivity potentiometer counterclockwise until there is no signal output or instantaneous flow back to zero.When adjusting the potentiometer,it should be as slow as possible.When adjusting the angle of 5 degrees,it should stop for more than 10 seconds in order to observe whether the output returns to zero.
 
  涡街流量计信号输出不规则、不稳定或瞬时流量不稳定;
  首先检查管道中介质流量是否超出传感器的可测流量范围;
  如果介质流量在可测范围内,检查前后直管段是否符合要求,并且确认管道中介质是否处于稳定流动状态,管道内无两相流或脉动流现象;
  检查管道振动强度是否过大;
  检查仪表周围是否有较强电干扰信号,若有加强屏蔽和接地;
  检查传感器是否被玷污、受潮、受损、引线接触不良,若有请清洗或更换传感器,紧固引线;
  检查传感器安装是否同心或密封垫是否凸入管内,若有安装情况,调整密封垫内径;
  检查传感器灵敏度的高低,调整灵敏度;
  检查工艺流程是否稳定,调整安装位置;
  检查发生体上是否有缠绕物;
  查看管道内是否存在气穴现象,若有降低流速,增加管内压力。
 
  The signal output of the vortex flowmeter is irregular,unstable or the instantaneous flow rate is unstable.
  First,check whether the medium flow in the pipeline is beyond the measurable flow range of the sensor.
  If the medium flow rate is within the measurable range,check whether the straight pipe section before and after the inspection meets the requirements,and confirm whether the medium in the pipeline is in a stable flow state,there is no two-phase flow or pulsating flow in the pipeline;
  Check whether the vibration intensity of the pipeline is too large.
  Check whether there is a strong electrical interference signal around the instrument,if there is enhanced shielding and grounding;
  Check whether the sensor is stained,damped,damaged,and the lead is not in good contact.If so,clean or replace the sensor and tighten the lead.
  Check whether the sensor installation is concentric or whether the gasket is protruded into the tube,and adjust the inner diameter of the gasket if there is installation.
  Check the sensitivity of the sensor and adjust the sensitivity.
  Check the stability of the process flow and adjust the installation position.
  Check for entanglement on the body.
  Check whether there is cavitation in the pipeline.If there is a decrease in flow rate,increase the pressure in the pipeline.
 
  PS:天津压力变送器如何安装,涡街流量计信号输出不准确或不稳定解决办法?
  PS:How to install the pressure transmitter in Tianjin,and how to solve the problem of inaccurate or unstable output of vortex flowmeter signal?